Can you put shingles on a low slope roof?

Can you put shingles on a low slope roof?

A roof is considered a low slope when the roof’s pitch is below a 2:12. This means your roof is less than 2 vertical units (inches or feet) up for every 12 horizontal units out. Because shingles can’t be installed on low slope roofs you won’t be able to get the commonly used asphalt shingles.

How low of a pitch can you use shingles?

Shingles can be installed on low-sloped roofs with a pitch of 3/12 inches. However, it will require additional layers under the shingles, such as a double layer of asphalt-saturated felt paper or a single layer of ice and water shield.

What should I use on a low slope roof?

Here are some of the most popular materials used with low-pitched roofs during roof replacement:

1. Tar and gravel, or BUR (built-up roofing) is made up of alternating layers of bitumen and reinforcing fabric.
2. Torch-down roofing is a single-layer membrane that has its seams sealed by fire during installation.

How steep does a roof have to be to be considered pitched?

OSHA defines a “steep roof” as any roof with a rise/run ratio over 4:12 (18.43 degrees). While most standard-pitched residential roofs seldom exceed a 12:12 pitch (45 degrees), the landscape is occasionally marked by a design which harkens back to earlier times, when much greater roof pitches were more common.

Can you Shingle A 2 12 pitch roof?

While roofs with a 4/12 pitch and steeper are ideal, the minimum roof pitch for shingles is 2/12. A roof with a 2/12 pitch can safely use shingles by incorporating additional layers of underlayment around the eaves.

What is a disadvantage of low slope roofs?

Disadvantages of Installing Low-Slope Roofing Systems Water, snow and ice can sit on low-pitched roofs longer than of steep-pitched ones. This can lead to leaks and damage if you do not remove these elements.

What is a major consideration with a low slope roof?

The three main components of a low-slope roof are the structural deck, the thermal insulation, and the membrane. Other vital parts of a low-slope roof include the flashing and air retarders, although these are considered accessories, along with vapor retarders, which are not an element found in all roofing systems.

Can asphalt shingles be installed on a low-slope roof?

The ARMA’s Residential Manual for Asphalt Roofing recommends that asphalt shingles on low-slope roofs be applied over a nonperforated single layer of adhesive-backed bituminous membrane installed to the manufacturer’s specifications, or over a double layer of asphalt-impregnated felt paper.

Can you put shingles on a 2 in 12 pitch roof?

A: Former senior editor Roe A. Osborn replies: According to the Asphalt Roofing Manufacturers Association (301-348-2002), asphalt shingles can be applied to a roof with a pitch as shallow as 2-in-12.

What is a good slope for a roof?

(Note: some roof specifications may express slope in the typical geometric terms of degrees. For reference, 2:12 equates to about 9.5º and 4:12 to about 18.5º). At slopes below 2:12, a granule-surfaced asphalt membrane can be installed, and many are available in colors to complement the shingle colors.

Can I use shingles on my existing roof?

If your existing roof has shingles on it and it’s time to re-roof, you can very likely use shingles again, but on questionable lower slopes it’s best to confirm the slope is above the 2:12 minimum just to be sure.